Question

A current of 1600 A exists in a rectangular (0.4-by-16cm) bus bar.
The current is due to free electrons moving through the wire at an
average velocity of v meters/second. If the concentration of free
electrons is 10^29 electrons per cubic meter and if they are
uniformly dispersed throughout the wire, then what is the average
velocity of an electron?
Using only the concepts that v=dw/dq and i=dq/dt how would i go
about solving this problem?